Weight loss surgery (WLS) is also known as Bariatric Surgery. It comes from the Greek work baros, which means weight.
WLS is a development of cancer/ulcer operations that consisted of removing part of a patient's stomach or small intestine. Those cancer/ulcer patients subsequently lost weight after surgery. Doctors decided the procedure might be beneficial for morbidly obese patients.
In 2008 about 220,000 bariatric operations were carried out in the USA (American Society for Bariatric Surgery). As obesity levels in America and many other parts of the world grow, so does the number of bariatric procedures. About 15 million people in the U.S. have morbid obesity; only 1% of the clinically eligible population is being treated for morbid obesity through bariatric surgery. According to the American Society for Bariatric Surgery, the average female surgery patient weighs about 300 pounds.
The American Society for Bariatric and Metabolic Surgery says that Bariatric surgery can improve or resolve more than 30 obesity-related conditions, including type 2 diabetes, heart disease, sleep apnea, hypertension and high cholesterol .
Basically, bariatric surgery alters your stomach or small intestine so that you are unable to consume much food in one sitting. This reduces the total number of calories you consume each day, thus helping to lose weight.
There are two types of bariatric surgeries: